Also listed on Pronutria, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Mar 15, 2033 · High confidence
20-year base term ends Mar 15, 2033
Filed Jul 22, 2014 as application 14/337,563 · Granted Apr 4, 2017
Base term, 20 years from filing
Today
2013
2033
Clock starts
Mar 15, 2013
Mar 15, 2013
Term ends
Mar 15, 2033
Mar 15, 2033
Granted
Apr 4, 2017
Apr 4, 2017
base term
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 8,809,259, US 8,822,412, US 9,700,071, to Mar 15, 2033. The term already ends on or before that date, so the cap shortened nothing.
2 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
7
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term is its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 2 of 3 maintenance fees are paid so far. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Mar 15, 2013, when application 13/836,855, the earliest non-provisional in its chain, was filed (this one was filed Jul 22, 2014) | Mar 15, 2033 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,809,259, US 8,822,412, US 9,700,071) | resolves to Mar 15, 2033, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 15, 2033 | High confidence |
This family
| US 8,809,259 | Lapsed on the fee record Aug 2026 | Aug 2026 |
| Application PCT/US2013/032212 | PCT application no patent term | no patent term |
| US 8,822,412 | Lapsed on the fee record Sep 2026 | Sep 2026 |
| US 9,611,298 | this patent Mar 2033 | Mar 2033 |
| US 10,450,350 | In force Mar 2033 | Mar 2033 |
| Application 16/566,734 | Abandoned not computed | not computed |
| Application 18/378,229 | Abandoned not computed | not computed |
The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| May 21, 2015 Reel 35691, frame 642 | Berry, David Arthur; Boghigian, Brett Adam; Silver, Nathaniel W.; Von Maltzahn, Geoffrey; Hamill, Michael J.; Chillakuru, Rajeev; Kramarczyk, John F. | Pronutria, Inc. | Assignment of Assignor's Interest |
| Mar 19, 2016 Reel 38177, frame 982 | Pronutria, Inc. | Pronutria Biosciences, Inc. | Assignment of Assignor's Interest |
| Oct 6, 2016 Reel 40249, frame 741 | Pronutria Biosciences, Inc. | Axcella Health Inc. | Assignment of Assignor's Interest |
| Sep 2, 2021 Reel 57435, frame 136 | Axcella Health Inc. | SLR Investment Corp., as Agent | Intellectual Property Security Agreement |
| Dec 15, 2022 Reel 62137, frame 569 | SLR Investment Corp. | Axcella Health Inc. | Release of Security Interest |
| Dec 20, 2023 Reel 66125, frame 228 | Axcella Health Inc. | Axcella (Assignment for the Benefit of Creditors), LLC | Assignment of Assignor's Interest |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
What's changing
Mar 2033
Term ends Mar 15, 2033. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 8,809,259, US 8,822,412, US 9,700,071, ends no earlier than this term, so it caps nothing.
Citations
21
later US patents cite this one
That is top 25% of utility patents granted in 2017 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.